Fibonacci-Hubbard Chain at Zero and Finite Temperatures

Details Fibonacci-Hubbard Chain at Zero and Finite Temperatures Fibonacci-Hubbard Chain at Zero and Finite Temperatures

2002-12-20

arxiv.org/abs/cond-mat/0212515v2

Physics

Condensed Matter

Strongly Correlated Electrons

20 pages, Latex, 9 figures (postscript)

Scientific paper

We have studied finite-sized single band Hubbard chains with Fibonacci modulation for half filling within a mean field approximation. The ground state properties, together with the dc conductivity both at zero and non-zero temperatures, are calculated for such quasi-periodic Hubbard chains. While a reduction in the conductivity is found for strong electronic interaction or strong Fibonacci modulation, a competition between these two is observed to enhance the conductivity. The results at finite temperatures also illustrate some interesting features of such finite-sized systems.

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